VoLTE Roaming Service - User Guide - SmarTone
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VoLTE Roaming Service

Dialling Method

Call within Destinations / Call to Other Destinations
Dial + Country/Territory Code Area Code (if applicable) Telephone Number
Note: To make VoLTE roaming calls within destinations / to other destinations, it is necessary to have both IDD & Roaming services enabled.
Call to Hong Kong
Dial + 852 Telephone Number

Caller ID on Receivers' Phone

Call within Destinations / Call to Other Destinations
Caller + 852 Telephone Number
Call to Hong Kong
Caller Telephone Number

Voice Alert for Receivers

Call within Destinations / Call to Other Destinations
Receivers will hear the overseas incoming call alert in certain destinations
Call to Hong Kong
Receivers will not hear the overseas incoming call alert

Connecting Tone

Callers will only hear the standard Hong Kong connecting tone no matter if you have enabled “Stealth Roaming” or not.

Call Forwarding Setting

When using VoLTE roaming, call forwarding cannot be set up via USSD codes (such as **21*). It is recommended to make the settings in advance before leaving Hong Kong. Customers can also call our 24-hour toll-free hotline at +852 28802688 or click here to log in to set up call forwarding.
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